Prosecution Insights
Last updated: October 04, 2026
Application No. 17/801,608

PROCESS FOR THE PREPARATION OF A FIBROUS PRODUCT

Non-Final OA §103
Filed
Aug 23, 2022
Priority
Feb 27, 2020 — EU 20159861.2 +1 more
Examiner
ZILBERING, ASSAF
Art Unit
1792
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Frieslandcampina Nederland B V
OA Round
4 (Non-Final)
35%
Grant Probability
At Risk
4-5
OA Rounds
0m
Est. Remaining
63%
With Interview

Examiner Intelligence

Grants only 35% of cases
35%
Career Allowance Rate
232 granted / 659 resolved
-29.8% vs TC avg
Strong +28% interview lift
Without
With
+27.8%
Interview Lift
resolved cases with interview
Typical timeline
4y 2m
Avg Prosecution
54 currently pending
Career history
717
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
63.5%
+23.5% vs TC avg
§102
7.9%
-32.1% vs TC avg
§112
22.3%
-17.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 659 resolved cases

Office Action

§103
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . DETAILED ACTION Status of Claims Note: The amendment of April 20th 2026 has been considered. Claims 1-12 are pending and examined in the current application. Any rejections not recited below have been withdrawn. Claim Rejections - 35 USC § 103 Applicant’s arguments, see “Remarks”, filed on April 20th 2026, with respect to the rejections of claims 1-12 under 35 USC §103 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, a new grounds of rejection is made under 35 USC §103 in view of Kweldam et al., (USPatPub. 20110244090 A1) and NPL Lantheaume “Vacuum cooling: From field to table” (from Physics World Focus on: Instruments & Vacuum, August 2019) (see discussion, below) The text of those sections of Title 35 of the U.S. Code not included in this action can be found in a prior Office action. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1-12 stand rejected under 35 U.S.C. 103 as being unpatentable over Kweldam et al., (USPatPub. 20110244090 A1) in view of NPL Lantheaume “Vacuum cooling: From field to table” (from Physics World Focus on: Instruments & Vacuum, August 2019). Regarding claims 1 and 3-12: Kweldam discloses a method of making a meat substitute comprising a fibrous product, wherein the fibrous product is made by forming a homogenous mixture of protein material comprising milk protein material (e.g., curd from cheesemaking, cheese, powdered milk, micellar casein isolate, whey protein, or caseinate), a hydrocolloid which precipitates with metal cations (e.g., alginate), and water in the presence of a calcium complex-forming agent (e.g., phosphate material) at a temperature between 30°C and 90°C, adding a solution of a metal cation with a valency of at least 2 (e.g., an aqueous calcium chloride solution) to the mixture in order to form the fibrous product, isolating the fibrous product and vacuum packing the fibrous product (see Kwedam abstract; paragraphs [0010]-[0014], [0017]-[0028], [0034]-[0038], [0051]-[0068] and [0093]-[0094]). Given the fact the temperature of forming the homogenous mixture recited in claim 1 lies inside the temperature of forming the homogenous mixture in Kweldam, a prima facie case of obviousness exists. As set forth in MPEP 2144.05, in the case where the claimed range “overlap or lie inside ranges disclosed by the prior art”, a prima facie case of obviousness exists, In re Wertheim, 541 F.2d 257, 191 USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990). As to the vacuum cooling and the cooling temperature recited in claims 1 and 9: Kweldam fails to disclose vacuum cooling the meat substitute; However, Lantheaume discloses vacuum cooling is a quick method of cooling food products, which allows for the foods to stay fresh and reducing bacterial growth (see Lantheaume pages 12 and 14). Therefore, it would have been obvious to a skilled artisan at the time the application was filed to have modified Kweldam and to have vacuum cooled the final product in order to reduce bacterial growth/spoilage and maintain a fresh product, and thus arrive at the claimed limitations. Regarding claim 2: While the rate of cooling the vacuum packed product is not recited in Kweldam in view of Lantheaume, Lantheaume discloses the cooling rate is adjusted to optimize the removal of uncondensed vapor and provide desired product (see Lantheaume from left column on page 12 to right column on page 14). Therefore, it would have been obvious to a skilled artisan at the time the application was filed to have modified Kweldam in view of Lantheaume and to have adjusted the cooling rate of the vacuum cooling to remove uncondensed vapor and attain desired product, and thus arrive at the claimed limitations. Response to Arguments Applicant’s arguments, see “Remarks”, filed on April 20th 2026, with respect to the rejections of claims 1-12 under 35 USC §103 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, a new grounds of rejection is made under 35 USC §103 in view of Kweldam et al., (USPatPub. 20110244090 A1) and NPL Lantheaume “Vacuum cooling: From field to table” (from Physics World Focus on: Instruments & Vacuum, August 2019) (see discussion, above). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ASSAF ZILBERING whose telephone number is (571)270-3029. The examiner can normally be reached M-F 8:30-5:00. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Erik Kashnikow can be reached at (571) 270-3475. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ASSAF ZILBERING/Examiner, Art Unit 1792
Read full office action

Prosecution Timeline

Show 1 earlier event
Dec 09, 2024
Non-Final Rejection mailed — §103
Mar 05, 2025
Response Filed
Jun 16, 2025
Non-Final Rejection mailed — §103
Sep 16, 2025
Response Filed
Jan 21, 2026
Non-Final Rejection mailed — §103
Apr 17, 2026
Interview Requested
Apr 20, 2026
Response Filed
Aug 27, 2026
Non-Final Rejection mailed — §103 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

4-5
Expected OA Rounds
35%
Grant Probability
63%
With Interview (+27.8%)
4y 2m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 659 resolved cases by this examiner. Grant probability derived from career allowance rate.

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